Declaring a Java Method. The syntax to declare a method is: returnType methodName() { // method body } Here, returnType - It specifies what type of value a method returns For example if a method has an int return type then it returns an integer value. In this article, we will learn the important object-oriented concept Delegation.Hand over the responsibility for a particular task to another class or method. I am quite confused with the Single Responsibility Principle. And when you click on Single-responsibility principle you get a page that has the following as its first paragraph: . We can find plenty of classes in all popular Java libraries which follow single responsibility principle. If the method does not return a value, its return type is void. This effectively leads to smaller methods and classes which are also testable. The Single Responsibility Principle represents a good way of identifying classes during the design phase of an application and it reminds you to think of all the ways a class can evolve. You can apply it to classes, software components, and microservices. For example, in Log4j2, we have different classes with logging methods, different classes are logging levels and so on. The single responsibility principle is one of the most commonly used design principles in object-oriented programming. When you use all the principles of S.O.L.I.D in a combined manner, it becomes easier for you to develop software that can be managed easily. In my last post, you learned what the Single Responsibility Principle is, why it is important, and its benefits.You’re now able to apply SRP at the class level.. Today, I’ll show you how to apply SRP at the method level.. By looking at some practical examples, you’ll learn how to spot potential code smells so that you can refactor your methods into shorter methods. Programs can have four styles of implementation comments: block, single-line, trailing, and end-of-line. The Single Responsibility Principle is based on the high cohesion principle. The Principle states that there should only be one reason for the class to change. Each letter of this acronym talks about principles in Java. In essence, it should ideally do one thing and do that well. The Single Responsibility Principle is the key software engineering principle which determines how we should modularise code in object oriented programming. Previous Next In this post, we will see 5 SOLID Principles in Java. The single-responsibility principle (SRP) is a computer-programming principle that states that every module, class or function in a computer program should have responsibility over a single part of that program's functionality, which it should encapsulate. Robert C. Martin gave five objected oriented design principles, and the acronym S.O.L.I.D is used for it. The problem which I am facing is, any change to a method or any logic change in doing things would change the class. Block comments are used to provide descriptions of files, methods, data structures and algorithms. A good separation of responsibilities is done only when the full picture of how the application should work is … Single Responsibility Principle: Every interface, class, or method we define should have a clearly defined goal. The difference between the two is that a highly cohesive classes features a set of responsibilities that are strongly related, while classes adhering to SRP have just one responsibility. 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